Atjbin



(No'Moael.)

A. Woon.

l LATHE.

No. 291,455. V Patented Jam. 1, 1884.

Illll'lllllllllllll 1' N. PETERS, PhomLmmgmpmr. washingmn. D. c

i a l Unir-inni. Sra'rns AUBIN woon, orwoncnsrnn, MAssAcHUsE'r'rs.'

y LATi-ls.

To alli/17mm, t may concern: y

i Be it known that I, AURIN` WOOD, a `citizen of the United States, residing at Worcester, in the` county of Vorcester and State ot' `Massa chusetts, have invented anew and useful'Improveinent in `Shaft-TurningLathes, ofv which the following is a specification.

Myinvention relates to airimproved mode of turning metal shaftsyalso, to certain improvements in shaft-turning lathes having a stationary tool-rest and a traversing or movable puppet; and the objects of :my invention are,` first, to provide a means of turning a metal shaft which shall obviate the necessity of supporting it upon centers; second, to enable shafts to be turned which are longer than the lathe-bed; third,when two or `more turningtools are used, to provide facilities for their adjustment relativelyto each other, and alsc for their simultaneous adjustment tothe shaft to be turned; fourth to throw the reverse feed 7 of thescrew or feed shaft out of gear automaticallywhen the head stack or puppet hasbeen runback to the tool-holder; fth, to provide an improved method of supporting` the driving and feed shafts in long lathes.

The mechanism embodying myinventiou is illustrated in the accompanying drawings, in which Figure l1 shows a front elevation of my improved lathe; Fig.' 2, a `plan view of the same, and Fig. 3 a Vdetailed view of a'portion ofthe devicefor supporting the shafts. Fig. 4 shows the base of post l?. r Similarletters refer to similar parts in the several figures. i

Ais thebed, upon the upper surface of which, in suitable guides, the head-stock or puppet D traverses. Poweris imparted tothe `pulley B, and, through the gcar-wheels a and c', to the central driving-shaft, C, extending the entire length of the lathe-bed. By the pinion c motion is givento the gear-wheel d, and by the pinion c and the intermediate el', a reverse motion is given to the gear-wheels. -These gears d and e run loosely upon the feedshaft S, which has a screw-thread nearly its whole length..` Between the gears d and e, I place the `clutch-coupling Q, consisting of a lbarrel havingthe two heads or plate-wheels f f pro- ;vdledwith the engaging-pinsf f.- This coupling is furnished with a key fitting a groove in SIVPECXFICATION forming part of Letters Patent No. 291,455, dated January d Application filled December E22, 1382. (No xnodcl.)

the shaft S, which permits it toslide on rthe shaft but communicates its rotary motion to the shaft S. Pivoted upon the side of y the lathebed is the bell-crank lever q yhaving a handle, j, on theend of its long arm, while the motion of its short a'rni acting upon the bosses i z', slide the bar g in the supporting-guides h 7L. The opposite end of the bar g is l:bent at right angles and made to embrace the barrel of the sliding clutch-coupling y, enabling the operator, by means of the'handlej, to put the clutch in connection with `either of the two gear-wheels` d or c, and thus impart a right or left hand motion to the screw-thread onthe shaft S. i The puppet D carries a hollow spindle, 1S, gear-wheel H, and chuck F, all driven bya sliding pinion, I-I, Fig. 1, on the main driving-shaft C. The pinion Hf, by means of a grooved neck and a yoke or `bar attached to thepuppet D, is made to slide on the shaft C, to accompany the puppet D as it traverses the lathe-bed. This construction is not shown in detail, it having been shown and described as a feature' of my invention in Letters Patent granted to nie March 24, 1874, No. 149,020.

The support G for the bar s to be turned, Figs. l` and 2, contains an ordinary-ring or collar, oryielding jaws, such as are described in the patent above named, or any of the coinmonly-used devices for the purpose of `supporting the shaft against the action of the cut; tingtools. The tool posts or holders t are placed upon slides o o o, each constructed and operated in the same way as the ordinary slide tool-rests in common lathes, thereby allowing each of the tools t to be adjusted independently` of the others. The slides o o o rest `upon and are operated by a similar slide, Z, by which thetools may be simultaneously operated,V At the end of the 'lathe andiopposite the `fa-ceof the chuck i F, I place upon suitable supports, P, a series of friction-pulleys, p, arranged in `pairs,for the purpose of supporting the bar s; The friction-pulleys p are arranged inthe usual manner of supporting revolvingshafts .in anti-friction bearings, and they are placed in such a position as shall bring the bar `s in a line with the center of fthe'hollow spindle E.-1" The postV l? has a slight swinging motion laterally, turning `upon thepivots 4 4 at the ICY) base. These pivotsarev held by the projections 3 3 extending upward from the base-plate 6. From each side of the base of the post P project iianges 7 7, which hold the checkscrews 5 5, which may be screwed downward, thereby limiting the motion of the-post on the pivots 4 4. This lateral motion of the post P is necessary when the bar s has any short crooks or other inequalities of surface which would throw the top of the posts out of line as the bar revolves. In order to keep the shaft Gand feed-shaft I from saggingin lathes of great length, I use the improved form of support partially shown in detail in Fig. 3.

Between the sides of the lathe-bed A A and sliding l'in suitable vertical guides, K K, is the plate J, carrying upon its center the shaftbearing I, and, by an arm attached at T and extending outside the lathe-bed, the bearing T for ,the screw-shaft S. Upon t-he center of the plate J is the rackIt, whose teeth engage with the toothed sector R, Fig. l, which vi brates upon the rod U and is operated by the weightedleverV, causing the plate J and the shaft-bearings I and T to be forced upward and pressed against their respective shafts. At the bottom of the plate .I and projecting outward and upward are the right-angled arms N N, having their upper ends, L, slightly rounded. As the puppetD traverses thelathebed the camplates m attached to the puppet and having their under surfaces inclined are made to passover and press upon the rounded surfaces L L, counteracting the weighted lever V, and lowering the plate J, and also the-two shaft-bearings I and T sufficiently to allow the pinion H and the nut on the feed-shaft S toy pass. When relieved of the pressure vof the cam-plates fm the plate J is raised bythe weighted lever V, bringing the bearingsI and T into position, as shown.

The lever Q, turning upon a spindle in the bearing M bolted to the side of the lathe-bed, has a projecting spur, XV, which, entering the v groove R in the upright arm, forms a latch which maintainsthe shaft-supports in their position independently of the weighted lever V; The latch is thrown into the position shown by means of the weighted lever O, and at the passage of the puppet D the latch is thrown out by the inclined surfaces a n of the cam-plates m on, Fig. 2, pressing against the linner surface of the upper end of the lever Q.

, When the puppet D is being run back` toward -nection with the gear-wheel (l. fods in common use of turning metal shafting,

the tool-holders t by the reverse motion-of the feed-screw shaft S, its motion is checked automatically at the proper time by the action of the cam-plate 7c, attached to the puppet D, operating by its inclined surface to lift the handlej'of the bell-crank lever q, thus moving the clutch-couplin g y on the feedshaft S out of con- By. the meththek shaft,afterbeing cut the proper` length,

fis. centered, straightened, and whilebei-ng turnedv is supported upon centers in the lathe and rotated about an axial line, bringing its surface against the turning -tools which are made to traverse along the lathe-bed. Certain improvements in this mode of operation were made the subject of Letters Patent granted to me March 24, 1874, Number 149,020, by which the shaft was supported at one end upon acenter and at the other by a chuck, and the two puppets were made t-o traverse the lathe-bed while the turning-tools remained stationary. By the present method Iadopta radical change from any of the plans hitherto pursued, and is as follows: The bar of iron, s, to be turned, is first straightened by any of the known methods in commonuse, and one end is turned to the required size for a few inches in height. The bar is then laid upon the friction-pulleys p, and the. finished end passed through the ring, collar, or yielding jaws in the ysupport G far enough to enable it to be firmly grasped by the jaws of the chuck F. Power is then applied and the tool-holders advanced to their proper position. The clutch-coupling on the feed-shaft S is put in connection with the gear'- wheel e by raising the handle j of the bellcrank lever q. Motion being thus given to the screw-shaft S, the puppet D is made to retreat from thecutting-tools, drawing the shaft which is being rotated by the chuck F, thus subjecting successive portions of the surface of the bar to the action of the cutting-tools, the bar of iron being supported by and rotating upon the several pairs of friction-pulleys p, thereby allowingthe free end of the, shaft so supported to move laterally whenever a short the' shaft is brought against the cutting-tools,

.and thisfeature of my present method essentially distinguishes it from the method set forth in my Patent No. 149,020, March 24, 1874, the plate J and the shaft-supports I and T being depressed by the cam-plates m m as the puppet traverses the lathe-bed. Should the shaft be longer than the lathe-bed the jaws of the chuck may be released and the puppet D run back, the hollow spindle E passing over the finished portion of the shaft, and the shaft grasped by the chuck nearer the tool-holders and another section turned, and this operation may be repeated until the entire length of the bar of iron is turned. Y

Among many advantages resulting from the above-described' mode of turning metal shafts, three may be mentioned of marked superiority: First, the shaft being drawn past the stationary cutting-tools, the` strain upon the barbing turned in the action of feeding is one of tension, and the tendency of the bar to spring or buckle, especially in the case of shafts of great length and of small diameter, is entirely obviated; second, shafts may be turned of much greater length than-the lathebed; third, the shaft does not require centering for either the purpose of straightening or turning, as it is supported by its periphery upon the friction-pulleys p, instead of being IIO suspended between the centers and rotated about an axial line, as in the usual method.

, I do not claim the use of' a traversing puppet or head-stock with a stationary toolholder, nor the mode of communicating motion from the driving-shaft Gto the spindle E by means "of a slidineP iinion H- nor do I claiman particular mode of steadying the bar s and holding it firmly against the cutting'tools at the support G, as I use the yielding jaws described in the patent granted tome March 24, 1874, No. 149,020, or a solid ring or collar such as is in `common use for that purpose; :neither do I claim any particular mode of construction or operation of the tool-holders t and slides o o o and Z, as I use the ordinary devices for operating the common sliding` toolrests in turninglathes; but

1What I do claim as my invention, and desire to secure by Letters Patent. is-

l. The combination. in a shaft-turning lathe, of the tool-holders t, fixed tools t, traversing` puppet D, and supporting-pulleys p, as described, and for the purposes set forth.

2. The combination, ina sh aft-turning lathe, of the tool-holders t, fixed tools t', traversing puppet D, hollow spindle E, and supportingpulleys p, as described, and for thc purposes set forth.

3. The combination, in a shafttnrning lathe, `of the stationary,tool-holders t, xedtools t, and supportingpulleys p, with means for rotating the shaft, as described, and for the purposes set forth.

4. The combination, in a lathe, of two or more cutting-tools, separate tool-holders t, slides o o4 o, by means of which each tool-holder t and its cutting-tool t' may be independently adjusted and Without loosening the tools in the tool posts or holders, and the slide Z carrying the slides o 0.o, and by means of which all the tool'holders and their tools may be adjusted conjointly, `as and for the purpose set forth.

5. The combination, with the traversing puppet D, of the cam-plate 7c, bell-crank lever q, clutch 1 gear-Wh eels d and e, and feedscrew S, all arranged and operating as set forth, and for the purpose speciiied.

6. The shaft-supports I and T, sliding plate J, rack R', sector R, and Weighted lever V, in combination with the shafts C and S, as described, and for the purposes set forth.

7. The shaft-supports I and T, sliding plate J, arms N N, Weighted lever V, operating as described, and the actuating cam-plates m m, attached to the puppet D, as and for the purposes set forth.

8. The combination, with the supports I and T, plate J, arms N N, and groove Il', of the latching device consisting of the lever Q, spur W, and weighted lever 0. all operating as described, and for the purposes set forth.

9. The combination, in a shaft-turning lathe, of the tool-holders t, fixed tools t', traversing puppet D, substantially as described, and means for supporting the free end of the shaft in a horizontal and vertical plane coincident with its axis of rotation, as and for the pur pose set forth.

l0. In a shaftturning lathe, the combination of the tool-holders t, cutting-tools t', supportingpulleys p, post P, capable of a lateral motion at the top, turning on the pivots 4 4 at the base, and suitable means for rotating the shaft, as and for the purpose set forth.

11,. In a shaft-turning lathe, the combination, with a series of supporting-pulleys, of a series of posts, I), with pivots 4 4 at the bottom of each post, so as to allow a slight lateral motion to the top of the post, as and for the purpose set forth.

12. In a shaft-turning lathe, the" posts P, flanges 7 7, and check-screws 5 5, as and for the purpose set forth.

AUBIN VOOD.

Vitnesses:

R. B. FoWLEn, H. M. FOWLER. 

